/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.plugins;

import java.util.List;

import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.InnerClass;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.codegen.ibatis2.Ibatis2FormattingUtilities;

/**
 * This plugin demonstrates adding methods to the example class to enable case-insensitive LIKE searches. It shows hows
 * to construct new methods and add them to an existing class.
 * 
 * This plugin only adds methods for String fields mapped to a JDBC character type (CHAR, VARCHAR, etc.)
 * 
 * @author Jeff Butler
 * 
 */
public class CaseInsensitiveLikePlugin extends PluginAdapter {

  /**
     * 
     */
  public CaseInsensitiveLikePlugin() {
    super();
  }

  public boolean validate(List<String> warnings) {
    return true;
  }

  @Override
  public boolean modelExampleClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {

    InnerClass criteria = null;
    // first, find the Criteria inner class
    for (InnerClass innerClass : topLevelClass.getInnerClasses()) {
      if ("GeneratedCriteria".equals(innerClass.getType().getShortName())) { //$NON-NLS-1$
        criteria = innerClass;
        break;
      }
    }

    if (criteria == null) {
      // can't find the inner class for some reason, bail out.
      return true;
    }

    for (IntrospectedColumn introspectedColumn : introspectedTable.getNonBLOBColumns()) {
      if (!introspectedColumn.isJdbcCharacterColumn() || !introspectedColumn.isStringColumn()) {
        continue;
      }

      Method method = new Method();
      method.setVisibility(JavaVisibility.PUBLIC);
      method.addParameter(new Parameter(introspectedColumn.getFullyQualifiedJavaType(), "value")); //$NON-NLS-1$

      StringBuilder sb = new StringBuilder();
      sb.append(introspectedColumn.getJavaProperty());
      sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
      sb.insert(0, "and"); //$NON-NLS-1$
      sb.append("LikeInsensitive"); //$NON-NLS-1$
      method.setName(sb.toString());
      method.setReturnType(FullyQualifiedJavaType.getCriteriaInstance());

      sb.setLength(0);
      sb.append("addCriterion(\"upper("); //$NON-NLS-1$
      sb.append(Ibatis2FormattingUtilities.getAliasedActualColumnName(introspectedColumn));
      sb.append(") like\", value.toUpperCase(), \""); //$NON-NLS-1$
      sb.append(introspectedColumn.getJavaProperty());
      sb.append("\");"); //$NON-NLS-1$
      method.addBodyLine(sb.toString());
      method.addBodyLine("return (Criteria) this;"); //$NON-NLS-1$

      criteria.addMethod(method);
    }

    return true;
  }
}
